高等学校化学学报 ›› 2003, Vol. 24 ›› Issue (5): 872.

• 论文 • 上一篇    下一篇

甲烷与HO2反应的微观动力学研究

崔草香, 吕文彩, 李泽生, 孙家锺   

  1. 吉林大学理论化学研究所, 理论化学计算国家重点实验室, 长春 130024
  • 收稿日期:2002-04-24 出版日期:2003-05-24 发布日期:2003-05-24
  • 通讯作者: 吕文彩(1963年出生),女,博士,副教授,从事量子化学研究.E-mail:wencailu@yahoo.com E-mail:wencailu@yahoo.com
  • 基金资助:

    国家自然科学基金(批准号:29892168);教育部骨干教师基金;教育部科学技术生产项目基金

Studies on Microdynamics of the Reaction Between HO2and Methane with Direct Ab Initio

CUI Cao-Xiang, LU Wen-Cai, LI Ze-Sheng, SUN Jia-Zhong   

  1. State Key Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun 130023, China
  • Received:2002-04-24 Online:2003-05-24 Published:2003-05-24

摘要: 应用从头算方法和变分过渡态理论,在B3LYP/6-311+G**方法下和300~2000K温度范围内研究甲烷与HO2反应的微观动力学特性,得到由过渡态向反应物方向、向产物方向的能垒分别是11.83和102.90kJ/mol,理论计算正向反应速率常数与实验值之比为1.08~2.85,用此方法还可以预测没有实验数据的温度点反应的速率常数.

关键词: HO2, 甲烷, Ab initio, 速率常数, 动力学分析

Abstract: The ab initio direct dynamics method at the B3LYP/6-311+G** level is employed to studythe HO2ion reaction CH4+ HO2- CH3+ H2O2on a wide temperature range 300-2000 K.The barrier heights obtained for the forward CH4+ HO2- CH3+ H2O2and reverse reactions CH3+H2O2- CH4-HO2are 11. 83 and 102. 90 kJ/mol, respectively. Comparing with one recent experiment. The ratio of kcvt/sct/kexptis within the range 1. 08-2. 85. We can expect that the predicted values at the high temperature are reliable.

Key words: Peroxide(HO2), Methane, Ab initio, Rate constants, Kinetic analysis

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